They just said "november", not "november 1st". november 30th is still november. As long as they aren't doing this until next month, it can be justified.
Also, DnD action is actually one of what I'm hyped about GMS2. According to the leaked video, you can convert the actions into codes. Action is causing worse performance? Turn it into gml, it will do what action did with better performance, problem solved. It's easy to compare the actions and codes, thus easier to learn gml.
Other parts are also hypeworthy as well to me. layer-based image edits, animated background tile support, etc, etc... I still hope I can use many high-resolution sprites without worrying about performance, though. as I always say.